Abstract
The effects of environmental and dispersal processes on macrofungi community assembly remain unclear. Further, it is not well understood if community assembly differs for different functional guilds of macrofungi, e.g., soil and rotten-wood macrofungi. In this study, using 2433 macrofungi sporocarps belonging to 217 species located within a forest dynamics plot in temperate mountain forest (China), we examined the explanatory power of topography, spatial eigenvectors (representing unknown spatial processes, e.g., dispersal), plant community, and light availability for local spatial variation in the macrofungi community through variance partitioning and partial least squares path modeling. We found spatial eigenvectors and light as the most important factors for explaining species richness and composition of macrofungi. Light was negatively correlated with species richness of macrofungi. Furthermore, species richness and composition of soil macrofungi were best explained by light, and species richness and composition of rotten-wood macrofungi were best explained by spatial eigenvectors. Woody plant community structure was not an important factor for species richness and composition of macrofungi. Our findings suggest that spatial processes, perhaps dispersal limitation, and light availability were the most important factors affecting macrofungi community in temperate deciduous broad-leaved forest. Major differences in influencing factors between soil and rotten-wood macrofungi were observed, with light as the major driver for soil macrofungi and unknown spatial processes as the major driver for rotten-wood macrofungi. These findings shed new light to the processes shaping community assembly in macrofungi in temperate deciduous broad-leaved forest and point to the potential importance of both intrinsic dynamics, such as dispersal, and external forcing, such as forest dynamics, via its effect on light availability.
Highlights
Macrofungi exert profound biological and economic impacts (Miles and Chang, 2004)
Macrofungi Community Assembly example, macrofungi are involved in biomass decomposition (Miles and Chang, 2004) and can rapidly migrate and colonize new areas faster than some vascular plants (Alday et al, 2017)
The species richness of macrofungi hump-shaped distributed from May to October
Summary
Macrofungi exert profound biological and economic impacts (Miles and Chang, 2004). The main macrofungi includes ascomycetes and basidiomycetes with large, observed spore-bearing structures. They constitute an important part of terrestrial ecosystems, forming a large share of their species diversity, and are key players in ecosystem processes (Senn-Irlet et al, 2007). For. Macrofungi Community Assembly example, macrofungi are involved in biomass decomposition (Miles and Chang, 2004) and can rapidly migrate and colonize new areas faster than some vascular plants (Alday et al, 2017). Despite the importance of macrofungi in nutrient cycling and succession in forest ecosystems, our current understanding of species diversity, community structure, and dynamics in macrofungi remains limited (Ferrer and Gilbert, 2003). The evaluation of the structure and dynamics of a macrofungi community and factors driving its variability provides information for future sustainable management of the diversity of macrofungi (Senn-Irlet et al, 2007)
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